/Engine/Source/Runtime/Engine/Classes/Engine/SystemTimeTimecodeProvider.h
Generate a frame time value, including subframe, using the high performance clock Using the high performance clock is faster but will make the value drift over time. This is an optimized version. Prefer GenerateTimecodeFromSystemTime, if the value need to be accurate.
static [FFrameTime](API\Runtime\Core\Misc\FFrameTime) GenerateFrameTimeFromHighPerformanceClock ( [FFrameRate](API\Runtime\Core\Misc\FFrameRate) Rate )